Improvement in coloring and sizing leather or paper board



E. ANDREWS. Coloring mid Sizing Leather or Paper Boarci N-0. 203,810.Patented May 21,1878. r m

JL 1 c J To all whom it may concern:

.UNITED STATES PATENT "OFFICE.

EMERY ANDREWS, OF KENNEBUNK, MAINE.

IMPROVEMENT IN COLORING AND SIZING LEATHER 0R PAPER BOARD.

' Specification forming part of Letters Patent No. 203,810, dated May21, 1878 application filed June 16, 1877. I

Be it known that I, EMERY ANnRnws, of Kennebunk, in the county of Yorkand State of Maine, have invented certain new and useful Improvements inColoring and Sizing or otherwise Treating Leather or Paper 'Board; and Ido hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art towhich it pertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

Figure 1 shows a side view; Fig. 2, sectional view; Fig. 3, perspective,showing position of rolls and gates.

The purpose of this invention is to produce a device for impartingcoloring, sizing, &c., to paper board or pulp after it has left thefelts, with increased economy and effectiveness.

It also consists in an improved process of accomplishing this result.

a, b, c, and d show the ordinary arrangements for screening the pulp andplacing it upon the felts preparatory to winding the same off on theroll 0. The devices a, b, c, and d, I of course do not claim.

Heretofore, as is'well. known, when coloring matter has been applied tothe pulp, it has been donein the beating-engine. In thismethod aboutfifty per cent of the coloring matter is wasted and destroyed. My deviceand process are intended to effect a saving 'of the chemicals for thepurposes specified.

With this view, I place the small supplemental roll f immediately incontact with the winding-roll c. This roll f has bearings at g, and iskept pressed up with proper force against the roll 6 by the boxes h,operated by the springs i. These boxes have projections which fit intogrooves in the horizontal parts j, and are thus kept in place. Thesprings z' allow the supplemental roll to recede slightly as the pulp orboard is wound around the winding-roll c. The roll f has the shouldersk. Against these shoulders, and into the space formed between theperipheries of the winding-roll e and supplemental roll f, where saidperipheries do not touch, and on the upper sides of said rolls, arefitted the stops or gates Z. These are supported by working throughholes in the bar a, and are capable of an up ward and downward movement,as the relative positions of the winding-roll and supplemental roll mayrequire. These two rolls, together with the stops or gates, when thepulp or board is on the, winding-roll e, are intended to form awater-tight trough or receptacle. Into this trough or receptacle thecoloring or sizing matter is poured, and it is then worked or rolledinto the pulp or board by the revolution of the winding-roll c and thesupplemental roll f. These two rolls are kept in revolution by contactand friction, e by contact with the felt-roll beneath it, and f by itscontact with 6. Thus all of the chemicals prepared for the purposesspecified are used, and none are wasted.

The roll 6 and the roll beneath it, as well as the parts a, b, c, and d,being common to paper making machines, need not be specificallydescribed.

The process of imparting coloring herein referred to consists inworking, rolling, or forcing the same into the pulp or board by pressureand after the pulp has'been couched.

I consider the devices above described best adapted to accomplish thedesired result; but modifications of them may be used to impart thechemicals to the sheet after it has been couched and before itreachesthe winding-roll.

The advantages of this invention may be further described as follows: Itis well-known to manufacturers that pulp free from coloring matter orchemicals will felt better than pulp first treated in the engines orstuff-chest with the chemicals. This invention secures this advantage.

The invention has special reference to th manufacture of leather-board,though it may be used to advantage on other kinds of paper orpaper-board.

By mixing cementive material with the color and size, board of superiorstrength and firmness can be obtained.

By a variation of the chemicals special grades of board may be made withgreater exactness,

economy, and certainty than when the pulp is treated in the engines inthe well-known way with the same chemicals. Thus a grade of board may bemade with special reference to its pliability, another grade withreference to its firmness and hardness, another with the property ofresisting water or dampness, and

all with the certainty that whatever chemicals are used will be put intothe board, instead of largely wasted, as in the old method.

I do not claim sizing and treating paper as described in the Patent No.495, December 1, 1837, whereby the same is size dafter completed anddried. My invention is for coloring and sizing the paper while in apulpy or semipulpy state and moist. My process relates to treating thepaper after it has been couched and before it has passed the firstpress-roll.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. The process of utilizing all the chemicals \employed in coloringand sizing pulp, facilitating the felting, improving the strength, andregulating the quality'of the same, which conmy own I aflix my signaturein presence of two witnesses.

' EMERY ANDREWS. Witnesses:

C. W. Goonnow, HERBERT S. BRIGHAM.

